Shezar, the Dominator of Light, is the princess of planet Antar, which was destroyed by a great war. Shezar has the power to transform into a monstrous beast, named Bismarck. In her arsenal, Shezar has a powerful sphere known as the Polarizer (Projects images and controls the creatures of the seas).

Comics:

Brazil Editoria Abril Comic Continuity:

Shezar came to Eternia, on a mission to find a new planet to colonize. She uses her ship, the Black Pearl (can spread a toxic vapor and black sparks to capture her victims) to kidnap four Eternian women to perpetuate her almost extinct species.

After Shezar kidnaps the fifth Unidentified Eternian Woman, from Lake Kroly, Prince Adam and Man-At-Arms travel to the lake to investigate.

During their investigation, the two heroes are attacked by the Black Pearl, but Adam resists long enough to transform into He-Man. He-Man follows the Black Pearl into the depths of Lake Kroly.

He is than captured by the Black Pearl's black sparks and meets Shezar inside the ship. He learns that Shezar plans to flood Eternia, to make it inhabitable for her people. It is also revealed that she had allied herself with Skeletor to accomplish this task.

Soon. Skeletor betrays her and steals the Polarizer, He-Man frees the four Unidentified Eternian Women and retrieves the Polarizer, but Shezar retrieves it and quickly leaves Eternia in the Black Pearl.